Connecting The Power Source; Table 3 - Gsm Operating Power; Table 4 - Gprs Operating Power - Enfora GSM2218 User Manual

2.7 Connecting the Power Source

The GSM/GPRS MT-GL has an input voltage range of 9 – 30 V DC. (See Table 3 and Table 4). The
power and ignition pins can support 9 – 30 V DC input voltage. The user has an option to connect
these wires depending on the desired functionality. Described below are the desired functionality and
their associated wire connecting procedure:
Use of the device outside of the specified voltage
!
range may result in damage to the device and/or
undesirable results.
Please follow the specifications as listed in the table
!
below. Enfora is not liable for damage to the MT-GL
caused due to user error.
Enfora MT-G (@ 12 Volts)
GSM 850 & GSM 1TX/1RX
900 1RX
Idle
DCS 1800 & GSM 1TX/1RX
PCS 1900 1RX
Idle
Enfora MT-G (@ 12 Volts)
GSM 850 & GPRS TBD1TX/1RX
900 1RX
Idle
DCS 1800 & GPRS TBD
PCS 1900
•
MT-GL Always ON
Connect the power and ground wires of the MT-GL to the battery leads. The MT-GL
o
will always remain ON as long as the battery lasts.
The MT-GL will be non-operational when the input voltage and current requirements
o
are not met (battery drains).
The Ignition wire has to be left open (not connected).
o
•
MT-GL Turns Off when Ignition Turned Off
Connect the power line of the MT-GL to an auxiliary power source, i.e. ignition.
o
Connect the ground wire to the chassis or negative terminal of the battery
o
The Ignition wire has to be left open (not connected).
o
GSM2218PB001MAN - GSM/GPRS MT-GL User Manual
Copyright 2005, Enfora L.P
PRELIMINARY TABLES
Average Current (mAmps)
390 mA
180 mA
65
400 mA
190 mA
55 mA

Table 3 - GSM Operating Power

Average Current (mAmps)
400 mA
190 mA
55 mA
400 mA
200 mA
55 mA

Table 4 - GPRS Operating Power

Peak Current (Amps)
0.600@32.5
0.570@32.0
Peak Current (Amps)
0.590@32.0
0.560@31.5
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